i have a problem with K2 media menager. It shows message
Invalid backend configuration.
Readable volumes not available.

Hello,

Are your file/ folder permissions correct?
Make sure your permissions are 755 for folders and 644 for files.
Also please deactivate error reporting from your site's global configuration if it set to anything else than none.

Hello again,
Myr file/ folder permissions are correct. 755 for folders and 644 for files. Error reporting is set to none.
I still receive same message when I click on media menager :( I am using joomla 2.5
and I found that some people had problem with their host blocking semilynks so I called them and make sure they don't ..but still same message. Can you help me

Which version of K2 and Joomla! (eg 2.5.28) are you using?